[mythtv-users] Sound issues with the pcHDTV 5500 analog tuner

Bob Sully rcs at malibyte.net
Sat Dec 16 19:21:28 UTC 2006


I must have something configured wrong in mythtv-setup.

I added your modification below (in my case, to /etc/modprobe.conf, which
is Mandrake's way of doing the same thing).

If I try to scan channels with the v4l subdevice, it only offers "full
scan" as an option, with no frequency options or anything else.  Clicking
on "next" results in ...nothing.  It goes to the next screen, but there's
no attempt to scan anything.

If I try to scan the lower channels under the dvb device (QAM-256), it
does attempt to scan the low channels, it sees a signal (the signal/noise
bar goes almost all the way to the right), but it times out on each
channel attempted, until it gets to the higher-order digital channels.  If
I try to do it with VSB-8, it doesn't see a signal.  QAM-64 behaves the
same as 256 with the analog channels.

If anyone can give me a clue as to which parameter(s) I may have
misconfigured, I'd really appreciate it.

BTW - most of the unenecrypted QAM-256 channels I do receive give me a
nice clean watchable stream (including the five unencrypted HD channels). 
There are a few, however, that are very poor quality, with
choppy/pixellated video and choppy audio.  Any reason why this would
happen on only a few streams?


Jesse Dhillon wrote:
> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
> <html>
> <head>
>   <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
>   <title></title>
> </head>
> <body bgcolor="#ffffff" text="#000000">
> I also made the following modifications:<br>
> <br>
> made a file called /etc/modprobe.d/dvb whose contents are:<br>
> options dvb_core dvb_shutdown_timeout=0<br>
> <br>
> and also set the "open DVB on demand" option for the DVB card (I think
> that's what it's called) in mythtv-setup.<br>
> <br>
> Jesse.<br>
> <br>
> <br>
> <br>
> <br>
> <br>
> Bob Sully wrote:
> <blockquote
>  cite="mid43845. at www.malibyte.net"
>  type="cite">
>   <pre wrap="">Jesse:
> This was the first way I had set it up, since it made the most sense, and
> I just set it back to that setup.  However, I can scan the QAM-256
> channels when I tell it to scan on the DVB input, but when I try to do a
> scan on the v4l subdevice, it just sits there and does nothing.
> aarrgh.
> Thanks
> Bob
> Jesse Dhillon wrote:
>   </pre>
>   <blockquote type="cite">
>     <pre wrap="">&lt;!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01
> Transitional//EN"&gt;
> &lt;html&gt;
> &lt;head&gt;
>   &lt;meta content="text/html;charset=ISO-8859-1"
> http-equiv="Content-Type"&gt;
> &lt;/head&gt;
> &lt;body bgcolor="#ffffff" text="#000000"&gt;
> I am able to scan both channels. I am using the v4l TV tuner that
> appears as a subdevice of the DVB device, specifically the "Television"
> input. Also, under the analog setup dialog for the card, under the
> Input Cards section of mythtv-setup, I specified the audio device as
> /dev/dsp1 which corresponds to cx88_alsa.&lt;br&gt;
> &lt;br&gt;
> Jesse.&lt;br&gt;
> &lt;br&gt;
>     </pre>
>   </blockquote>
>   <pre wrap=""><!---->
>   </pre>
> </blockquote>
> </body>
> </html>

Bob Sully - Simi Valley, California, USA

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